package com.ty.generator.renren.utils;

import com.ty.generator.renren.config.MongoManager;
import com.ty.generator.renren.entity.ColumnEntity;
import com.ty.generator.renren.entity.TableEntity;
import com.ty.generator.renren.entity.mongo.MongoDefinition;
import com.ty.generator.renren.entity.mongo.MongoGeneratorEntity;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.WordUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;

import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 代码生成器 工具类
 *
 * @author chenshun
 * @email sunlightcs@gmail.com
 * @date 2016年12月19日 下午11:40:24
 */
public class GenUtils {

  private static String currentTableName;

  public static List<String> getTemplates() {
    List<String> templates = new ArrayList<String>();
    templates.add("template/Entity.java.vm");
    templates.add("template/Dao.xml.vm");

    templates.add("template/menu.sql.vm");

    templates.add("template/Service.java.vm");
    templates.add("template/ServiceImpl.java.vm");
    templates.add("template/Controller.java.vm");
    templates.add("template/Dao.java.vm");

    templates.add("template/index.vue.vm");
    templates.add("template/add-or-update.vue.vm");
    if (MongoManager.isMongo()) {
      // mongo不需要mapper、sql   实体类需要替换
      templates.remove(0);
      templates.remove(1);
      templates.remove(2);
      templates.add("template/MongoEntity.java.vm");
    }
    return templates;
  }

  public static List<String> getMongoChildTemplates() {
    List<String> templates = new ArrayList<String>();
    templates.add("template/MongoChildrenEntity.java.vm");
    return templates;
  }

  /** 生成代码 */
  public static void generatorCode(
      Map<String, String> table, List<Map<String, String>> columns, ZipOutputStream zip) {
    // 配置信息
    Configuration config = getConfig();
    boolean hasBigDecimal = false;
    boolean hasList = false;
    // 表信息
    TableEntity tableEntity = new TableEntity();
    tableEntity.setTableName(table.get("tableName"));
    tableEntity.setComments(table.get("tableComment"));
    // 表名转换成Java类名
    String className =
        tableToJava(tableEntity.getTableName(), config.getStringArray("tablePrefix"));
    tableEntity.setClassName(className);
    tableEntity.setClassname(StringUtils.uncapitalize(className));

    // 列信息
    List<ColumnEntity> columsList = new ArrayList<>();
    for (Map<String, String> column : columns) {
      ColumnEntity columnEntity = new ColumnEntity();
      columnEntity.setColumnName(column.get("columnName"));
      columnEntity.setDataType(column.get("dataType"));
      columnEntity.setComments(column.get("columnComment"));
      columnEntity.setExtra(column.get("extra"));

      // 列名转换成Java属性名
      String attrName = columnToJava(columnEntity.getColumnName());
      columnEntity.setAttrName(attrName);
      columnEntity.setAttrname(StringUtils.uncapitalize(attrName));

      // 列的数据类型，转换成Java类型
      String attrType =
          config.getString(columnEntity.getDataType(), columnToJava(columnEntity.getDataType()));
      columnEntity.setAttrType(attrType);

      if (!hasBigDecimal && attrType.equals("BigDecimal")) {
        hasBigDecimal = true;
      }
      if (!hasList && "array".equals(columnEntity.getExtra())) {
        hasList = true;
      }
      // 是否主键
      if ("PRI".equalsIgnoreCase(column.get("columnKey")) && tableEntity.getPk() == null) {
        tableEntity.setPk(columnEntity);
      }

      columsList.add(columnEntity);
    }
    tableEntity.setColumns(columsList);

    // 没主键，则第一个字段为主键
    if (tableEntity.getPk() == null) {
      tableEntity.setPk(tableEntity.getColumns().get(0));
    }

    // 设置velocity资源加载器
    Properties prop = new Properties();
    prop.put(
        "file.resource.loader.class",
        "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    Velocity.init(prop);
    String mainPath = config.getString("mainPath");
    mainPath = StringUtils.isBlank(mainPath) ? "com.ty.generator.renren" : mainPath;
    // 封装模板数据
    Map<String, Object> map = new HashMap<>();
    map.put("tableName", tableEntity.getTableName());
    map.put("comments", tableEntity.getComments());
    map.put("pk", tableEntity.getPk());
    map.put("className", tableEntity.getClassName());
    map.put("classname", tableEntity.getClassname());
    map.put("pathName", tableEntity.getClassname().toLowerCase());
    map.put("columns", tableEntity.getColumns());
    map.put("hasBigDecimal", hasBigDecimal);
    map.put("hasList", hasList);
    map.put("mainPath", mainPath);
    map.put("package", config.getString("package"));
    map.put("moduleName", config.getString("moduleName"));
    map.put("author", config.getString("author"));
    map.put("email", config.getString("email"));
    map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
    VelocityContext context = new VelocityContext(map);

    // 获取模板列表
    List<String> templates = getTemplates();
    for (String template : templates) {
      // 渲染模板
      StringWriter sw = new StringWriter();
      Template tpl = Velocity.getTemplate(template, "UTF-8");
      tpl.merge(context, sw);

      try {
        // 添加到zip
        zip.putNextEntry(
            new ZipEntry(
                getFileName(
                    template,
                    tableEntity.getClassName(),
                    config.getString("package"),
                    config.getString("moduleName"))));
        IOUtils.write(sw.toString(), zip, "UTF-8");
        IOUtils.closeQuietly(sw);
        zip.closeEntry();
      } catch (IOException e) {
        throw new RRException("渲染模板失败，表名：" + tableEntity.getTableName(), e);
      }
    }
  }

  /** 生成mongo其他实体类的代码 */
  public static void generatorMongoCode(String[] tableNames, ZipOutputStream zip) {
    for (String tableName : tableNames) {
      MongoDefinition info = MongoManager.getInfo(tableName);
      currentTableName = tableName;
      List<MongoGeneratorEntity> childrenInfo = info.getChildrenInfo(tableName);
      childrenInfo.remove(0);
      for (MongoGeneratorEntity mongoGeneratorEntity : childrenInfo) {
        generatorChildrenBeanCode(mongoGeneratorEntity, zip);
      }
    }
  }

  private static void generatorChildrenBeanCode(
      MongoGeneratorEntity mongoGeneratorEntity, ZipOutputStream zip) {
    // 配置信息
    Configuration config = getConfig();
    boolean hasList = false;
    // 表信息
    TableEntity tableEntity = mongoGeneratorEntity.toTableEntity();
    // 表名转换成Java类名
    String className =
        tableToJava(tableEntity.getTableName(), config.getStringArray("tablePrefix"));
    tableEntity.setClassName(className);
    tableEntity.setClassname(StringUtils.uncapitalize(className));
    // 列信息
    List<ColumnEntity> columsList = new ArrayList<>();
    for (Map<String, String> column : mongoGeneratorEntity.getColumns()) {
      ColumnEntity columnEntity = new ColumnEntity();
      String columnName = column.get("columnName");
      if (columnName.contains(".")) {
        columnName = columnName.substring(columnName.lastIndexOf(".") + 1);
      }
      columnEntity.setColumnName(columnName);
      columnEntity.setDataType(column.get("dataType"));
      columnEntity.setExtra(column.get("extra"));

      // 列名转换成Java属性名
      String attrName = columnToJava(columnEntity.getColumnName());
      columnEntity.setAttrName(attrName);
      columnEntity.setAttrname(StringUtils.uncapitalize(attrName));

      // 列的数据类型，转换成Java类型
      String attrType =
          config.getString(columnEntity.getDataType(), columnToJava(columnEntity.getDataType()));
      columnEntity.setAttrType(attrType);

      if (!hasList && "array".equals(columnEntity.getExtra())) {
        hasList = true;
      }
      columsList.add(columnEntity);
    }
    tableEntity.setColumns(columsList);

    // 设置velocity资源加载器
    Properties prop = new Properties();
    prop.put(
        "file.resource.loader.class",
        "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
    Velocity.init(prop);
    String mainPath = config.getString("mainPath");
    mainPath = StringUtils.isBlank(mainPath) ? "com.ty.generator.renren" : mainPath;
    // 封装模板数据
    Map<String, Object> map = new HashMap<>();
    map.put("tableName", tableEntity.getTableName());
    map.put("comments", tableEntity.getComments());
    map.put("pk", tableEntity.getPk());
    map.put("className", tableEntity.getClassName());
    map.put("classname", tableEntity.getClassname());
    map.put("pathName", tableEntity.getClassname().toLowerCase());
    map.put("columns", tableEntity.getColumns());
    map.put("hasList", hasList);
    map.put("mainPath", mainPath);
    map.put("package", config.getString("package"));
    map.put("moduleName", config.getString("moduleName"));
    map.put("author", config.getString("author"));
    map.put("email", config.getString("email"));
    map.put("datetime", DateUtils.format(new Date(), DateUtils.DATE_TIME_PATTERN));
    VelocityContext context = new VelocityContext(map);

    // 获取模板列表
    List<String> templates = getMongoChildTemplates();
    for (String template : templates) {
      // 渲染模板
      StringWriter sw = new StringWriter();
      Template tpl = Velocity.getTemplate(template, "UTF-8");
      tpl.merge(context, sw);
      try {
        // 添加到zip
        zip.putNextEntry(
            new ZipEntry(
                getFileName(
                    template,
                    tableEntity.getClassName(),
                    config.getString("package"),
                    config.getString("moduleName"))));
        IOUtils.write(sw.toString(), zip, "UTF-8");
        IOUtils.closeQuietly(sw);
        zip.closeEntry();
      } catch (IOException e) {
        throw new RRException("渲染模板失败，表名：" + tableEntity.getTableName(), e);
      }
    }
  }

  /** 列名转换成Java属性名 */
  public static String columnToJava(String columnName) {
    return WordUtils.capitalizeFully(columnName, new char[] {'_'}).replace("_", "");
  }

  /** 表名转换成Java类名 */
  public static String tableToJava(String tableName, String[] tablePrefixArray) {
    if (null != tablePrefixArray && tablePrefixArray.length > 0) {
      for (String tablePrefix : tablePrefixArray) {
        if (tableName.startsWith(tablePrefix)) {
          tableName = tableName.replaceFirst(tablePrefix, "");
        }
      }
    }
    return columnToJava(tableName);
  }

  /** 获取配置信息 */
  public static Configuration getConfig() {
    try {
      return new PropertiesConfiguration("generator.properties");
    } catch (ConfigurationException e) {
      throw new RRException("获取配置文件失败，", e);
    }
  }

  /** 获取文件名 */
  public static String getFileName(
      String template, String className, String packageName, String moduleName) {
    String packagePath = "main" + File.separator + "java" + File.separator;
    if (StringUtils.isNotBlank(packageName)) {
      packagePath +=
          packageName.replace(".", File.separator) + File.separator + moduleName + File.separator;
    }
    if (template.contains("MongoChildrenEntity.java.vm")) {
      return packagePath
          + "entity"
          + File.separator
          + "inner"
          + File.separator
          + currentTableName
          + File.separator
          + splitInnerName(className)
          + "InnerEntity.java";
    }
    if (template.contains("Entity.java.vm") || template.contains("MongoEntity.java.vm")) {
      return packagePath + "entity" + File.separator + className + "Entity.java";
    }

    if (template.contains("Dao.java.vm")) {
      return packagePath + "dao" + File.separator + className + "Dao.java";
    }

    if (template.contains("Service.java.vm")) {
      return packagePath + "service" + File.separator + className + "Service.java";
    }

    if (template.contains("ServiceImpl.java.vm")) {
      return packagePath
          + "service"
          + File.separator
          + "impl"
          + File.separator
          + className
          + "ServiceImpl.java";
    }

    if (template.contains("Controller.java.vm")) {
      return packagePath + "controller" + File.separator + className + "Controller.java";
    }

    if (template.contains("Dao.xml.vm")) {
      return "main"
          + File.separator
          + "resources"
          + File.separator
          + "mapper"
          + File.separator
          + moduleName
          + File.separator
          + className
          + "Dao.xml";
    }

    if (template.contains("menu.sql.vm")) {
      return className.toLowerCase() + "_menu.sql";
    }

    if (template.contains("index.vue.vm")) {
      return "main"
          + File.separator
          + "resources"
          + File.separator
          + "src"
          + File.separator
          + "views"
          + File.separator
          + "modules"
          + File.separator
          + moduleName
          + File.separator
          + className.toLowerCase()
          + ".vue";
    }

    if (template.contains("add-or-update.vue.vm")) {
      return "main"
          + File.separator
          + "resources"
          + File.separator
          + "src"
          + File.separator
          + "views"
          + File.separator
          + "modules"
          + File.separator
          + moduleName
          + File.separator
          + className.toLowerCase()
          + "-add-or-update.vue";
    }

    return null;
  }

  private static String splitInnerName(String name) {
    name = name.replaceAll("\\.", "_");
    return name;
  }
}
